| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a breakpoint detection method for a PC cable in a PC structure that: can perform a nondestructive detection of a breakpoint of the PC cable inside a steel sheath, which is conventionally recognized as a difficult detecting operation; and has many advantages including wide applicability to the PC structures placed in normal service. <P>SOLUTION: A breakpoint detection method for a PC cable in a PC structure: searches an embedded place of a steel sheath inside an existing PC structure; and installs a plurality of sound sensors on a surface of the existing PC structure along the searched embedded place of the steel sheath. The sound sensors detect friction sound caused by fluctuation of a PC cable broken by a weight of a heavy load applied to the existing PC structure in association with placing the same in service. A breakpoint of the PC cable in the existing PC structure can be detected by identifying a generation source of the friction sound on the basis of differences in detection times when respective sound sensors detect the friction sound and installation positions of the sound sensors. <P>COPYRIGHT: (C)2013,JPO&INPIT |
